welcome from northern Rockies. nearly all Bersa .22 owners will advise to use powerful ammo. you probably know that. i use CCI mini mag. this advise applies to all .22 semi autos. having a .22 in the same configuration as your carry weapon is a great idea. saves alot of money while staying familiar with your carry handgun. it doesn't take long to pay for the .22 handgun with money saved on ammo purchases.